58 research outputs found
A Topology-Independent Mapping Technique for Application-Specific Networks-on-Chip
The design of Networks-on-Chip (NoCs) involves several key issues, including the topological mapping, that is, the mapping of the processing elements or Intellectual Properties (IPs) to the network nodes. Although several proposals have been focused on topological mapping last years, this topic is still an open issue. In this paper, we propose, in an extended manner, a topology-independent mapping technique for application-specific NoCs that can be used with regular or irregular topologies, and with any routing algorithm. This technique globally matches the communication pattern generated by the IPs with the available network bandwidth in the different parts of the network. The evaluation results show that the proposed technique can provide better performance than other mapping techniques not only in terms of average latency and network throughput, but also in terms of power consumption
The MANGO Process for Designing and Programming Multi-Accelerator Multi-FPGA Systems
[EN] This paper describes the approach followed in the European FETHPC MANGO project to design and program systems made of multiple FPGAs interconnected. The MANGO approach relies on the instantiation and management of multiple generic and custom-made accelerators which can be programmed to communicate each other via shared memory and through synchronization registers. The paper introduces the low level architecture including the multi-FPGA interconnect deployed, the communication protocol and the architectural template-based approach to simplify the design process.This work is supported by the European Commission through MANGO project, under the Horizon 2020 FET-HPC program, grant number 671668.Tornero-Gavilá, R.; Flich Cardo, J.; Martínez Martínez, JM.; Picornell-Sanjuan, T.; Scotti, V. (2018). The MANGO Process for Designing and Programming Multi-Accelerator Multi-FPGA Systems. En Fourth International Workshop on Heterogeneous High-Performance Reconfigurable Computing (H2RC'18). ACM. http://hdl.handle.net/10251/114284
Procedimientos de seguridad para trabajos en altura en minería
Algunas de las tareas preliminares para la apertura de una explotación a Cielo Abierto, de un nuevo frente de ésta, de un acceso, así como las actividades de protección, sostenimiento o restauración de taludes finales, requieren la ejecución de trabajos en el medio vertical: desarrollados en laderas o taludes de elevada pendiente, con riesgos de caídas a gran altura y también, en ocasiones, con riesgo de desprendimiento de rocas. En el presente, las empresas que prestan servicios en este campo han adaptado procedimientos del mundo de la escalada o
la espeleología, empleando utensilios y elementos de protección de contrastada eficacia pero sin que haya sido reconocida su homologación como tales. El personal, que también procede del ámbito deportivo, presenta excelentes aptitudes para estos trabajos pero no han sido tampoco
establecidos los requisitos normativos que garanticen esa aptitud.
La diversidad de actividades y las diferentes circunstancias que rodean a éstas convierten a los procedimientos de seguridad para trabajos en altura en una interesante línea de estudio de seguridad. Nosotros queremos con esta comunicación aportar algunos ejemplos con los que resaltar la importancia de eliminar el vacío o ambigüedad normativa en estos trabajos que
tienen una repercusión económica elevada.Laboratorio oficial J.M. Madariaga. Universidad Politécnica de Madri
From a FPGA Prototyping Platform to a Computing Platform: The MANGO Experience
[EN] In this paper we describe the evolution of the FPGA-based prototype deployed in the MANGO project, from a hardware prototyping platform of HPC architectures to a computing platform targeting HPC and AI applications. Our main goal is to reinvest on the MANGO cluster by providing a duality in its use for both large-scale hardware prototyping and highperformance computation. From our experience we can reach several interesting conclusions about the complexities and hurdles that lay below FPGA technologies, and therefore, shedding some light onto the real complexities that difficult the adoption of FPGAs on either large-scale pure HPC systems or on hybrid systems (HPC + BigData/Ai).This work is supported by the European Commission through
RECIPE and DeepHealth projects, under the Horizon 2020
program, grant number 801137 and 825111, respectively.Flich Cardo, J.; Tornero-Gavilá, R.; Rodríguez, D.; Russo, D.; Martínez Martínez, JM.; Hernández Luz, C. (2021). From a FPGA Prototyping Platform to a Computing Platform: The MANGO Experience. IEEE. 1-6. https://doi.org/10.23919/DATE51398.2021.94740511
An array of leaky wave antennas for indoor smart wireless access point applications
An array of leaky-wave antennas (LWA), designed for indoor smart wireless access points applications is presented in this work. It is designed to produce directive frequency scanning in the 2.45 Wi-Fi band. More particularly, it is demonstrated how three different Wi-Fi channels, namely channel #1 (2.412 GHz), channel #6 (2.437 GHz), and channel #11 (2.462 GHz), can be directed towards different directions in space and offering high gain. In this way, it is proposed a simple channel-hopping technique to provide high signal levels in a wide area, and thus assure high data transmissions. The array is designed in single layer planar technology, using low-cost laminate to provide a low-profile antenna structure which can be mounted on ceilings.This work has been supported by Spanish national projects TEC2016-75934-C4-4-R and European Erasmus Grant KA107 Morocc
Spanish study of anticoagulation in haemodialysis
This study's objectives were to determine which anticoagulation
methods are commonly used in patients who are undergoing haemodialysis (HD) in
Spain, on what criteria do they depend, and the consequences arising from their
use. MATERIAL AND METHOD: Ours was a cross-sectional study based on two types of
surveys: a "HD Centre Survey" and a "Patient Survey". The first survey was
answered by 87 adult HD units serving a total of 6093 patients, as well as 2
paediatric units. Among these units, 48.3% were part of the public health system
and the remaining 51.7% units were part of the private health system. The patient
survey analysed 758 patients who were chosen at random from among the
aforementioned 78 HD units. RESULTs: A) HD Centre Survey: The majority of adult
HD units (n=61, 70.2%) used both kinds of heparin, 19 of them (21.8%) only used
LMWH and 7 of them (8%) only used UFH. The most frequently applied criteria for
the use of LMWH were medical indications (83.3% of HD units) and ease of
administration (29.5%). The most frequently used methods for adjusting the dosage
were clotting of the circuit (88.2% of units), bleeding of the vascular access
after disconnection (75.3%), and patient weight (57.6%). B) Patient Survey: The
distribution of the types of heparin used was: UFH: 44.1%, LMWH: 51.5%, and
dialysis without heparin in 4.4% of patients. LMWH was more frequently used in
public medical centres (64.2% of patients) than in private medical centres
(46.1%) (P<.001). LMWH was more frequently used in on-line haemodiafiltration
(HF) than in high-flux HD (P<.001). Antiplatelet agents were given to 45.5% of
patients, oral anticoagulants to 18.4% of patients, and both to 5% of patients.
Additionally, 4.4% of patients had suffered bleeding complications during the
previous week, and 1.9% of patients suffered thrombotic complications. Bleeding
complications were more frequent in patients with oral anticoagulants (P=.001),
although there was no association between the type of heparin and the occurrence
of bleeding or thrombotic complications. CONCLUSIONS: We are able to conclude
that there is a great amount of disparity in the criteria used for the medical
prescription of anticoagulation in HD. It is advisable that each HD unit revise
their own results as well as those from other centres, and possibly to create an
Anticoagulation Guide in Haemodialysis
Predictive Reliability and Fault Management in Exascale Systems: State of the Art and Perspectives
© ACM, 2020. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in ACM Computing Surveys, Vol. 53, No. 5, Article 95. Publication date: September 2020. https://doi.org/10.1145/3403956[EN] Performance and power constraints come together with Complementary Metal Oxide Semiconductor technology scaling in future Exascale systems. Technology scaling makes each individual transistor more prone to faults and, due to the exponential increase in the number of devices per chip, to higher system fault rates. Consequently, High-performance Computing (HPC) systems need to integrate prediction, detection, and recovery mechanisms to cope with faults efficiently. This article reviews fault detection, fault prediction, and recovery techniques in HPC systems, from electronics to system level. We analyze their strengths and limitations. Finally, we identify the promising paths to meet the reliability levels of Exascale systems.This work has received funding from the European Union's Horizon 2020 (H2020) research and innovation program under the FET-HPC Grant Agreement No. 801137 (RECIPE). Jaume Abella was also partially supported by the Ministry of Economy and Competitiveness of Spain under Contract No. TIN2015-65316-P and under Ramon y Cajal Postdoctoral Fellowship No. RYC-2013-14717, as well as by the HiPEAC Network of Excellence. Ramon Canal is partially supported by the Generalitat de Catalunya under Contract No. 2017SGR0962.Canal, R.; Hernández Luz, C.; Tornero-Gavilá, R.; Cilardo, A.; Massari, G.; Reghenzani, F.; Fornaciari, W.... (2020). Predictive Reliability and Fault Management in Exascale Systems: State of the Art and Perspectives. ACM Computing Surveys. 53(5):1-32. https://doi.org/10.1145/3403956S132535Abella, J., Hernandez, C., Quinones, E., Cazorla, F. J., Conmy, P. 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IEEE Internet Com
Evaluation of Medicine Abuse Trends in Community Pharmacies: The Medicine Abuse Observatory (MAO) in a Region of Southern Europe
The misuse of medicines is a global public health concern that needs to be taken into consideration and requires actions across all government sectors and society. The aim of this study is to identify trends of drug abuse in Catalonia, a region of Spain located in the South of Europe. For this purpose, a questionnaire-based detection tool was created and implemented in 60 community pharmacies. Out of 548 questionnaires (98.4%), 64.2% of participants were men and the highest age proportion was 25-35 years (31.4%). Potential drug abuse was the highest in urban pharmacies (84.9%). The main drug class involved were benzodiazepines (31.8%), codeine (19.3%), tramadol (7.5%), methylphenidate (5.8%), gabapentinoids (5.8%), cycloplegic drops (4.4%), z-drugs (2.6%), piracetam (2.2%), dextromethorphan (1.6%) and clomethiazole (1.1%). The majority of drugs were requested without prescription (58.6%) and through probably forged prescriptions (23.7%). Slightly less than half (49.8%) of the patients request frequently to the pharmacist, especially in rural and mountain pharmacies (73.3% and 88.5%, respectively). A small proportion (10.8%) were requested with intimidation. Pharmacists only supplied in 21.7% of the cases. This study has demonstrated the suitability of the new detection system, being a useful approach to replicate in other locations with similar needs
Class Hexapoda: general introduction
Hexapods in the Mediterranean Basin are very diverse in terms of species and biological traits, and have been used in both fundamental and applied research. The chapter covers different aspects of the biology and ecology of Hexapods, with special emphasis on those subjects that are relevant in the Mediterranean context. Moreover, it includes a taxonomic key for Entognatha (springtails) at species level and Insecta at order level. The biology and ecology of Hexapods is separated into two different sections: aquatic or semiaquatic springtails and aquatic insects. The second section includes the topics like origin of endemicity, singular aquatic habitats, biological traits, dispersal strategies, metacommunities dynamics, their role in food webs, their response to disturbances, their use in biological assessment of water quality, and known alien aquatic Hexapods. Conservation and management of aquatic Hexapods in the Mediterranean Basin represent a challenge because of their high biodiversity, with adapted species to the hydrological characteristics imposed by the Mediterranean climate, and the fact that aquatic habitats are under intense human pressures.Peer reviewe
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